[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: collect-string (was: simple useful functions)
From: |
Tak Ota |
Subject: |
Re: collect-string (was: simple useful functions) |
Date: |
Thu, 4 Nov 2010 13:18:20 -0700 |
The documentation can be something like this. I just added the last
paragraph below.
-Tak
`M-x occur'
Prompt for a regexp, and display a list showing each line in the
buffer that contains a match for it. To limit the search to part
of the buffer, narrow to that part (*note Narrowing::). A numeric
argument N specifies that N lines of context are to be displayed
before and after each matching line. Currently, `occur' can not
correctly handle multiline matches.
The buffer `*Occur*' containing the output serves as a menu for
finding the occurrences in their original context. Click
`Mouse-2' on an occurrence listed in `*Occur*', or position point
there and type <RET>; this switches to the buffer that was
searched and moves point to the original of the chosen occurrence.
`o' and `C-o' display the match in another window; `C-o' does not
select it.
After using `M-x occur', you can use `next-error' to visit the
occurrences found, one by one. *note Compilation Mode::.
When the numeric argument N is 0 or negative the buffer `*Occur*'
collects all the matched strings. When N is 0 the entire text
matched is collected. When N is negative the text in the -Nth
parenthesized expression in the regexp is collected.
Thu, 04 Nov 2010 11:36:54 -0700: Tak Ota <address@hidden> wrote:
> Thu, 4 Nov 2010 06:58:20 -0700: Stefan Monnier <address@hidden> wrote:
>
> > >> How about rename the command as collect-occur instead of
> > >> collect-string and document it as next?
> > > Wrong namespace. IMO, the name should *start* with occur (but Stefan
> > > and Yidong are final authorities on that).
> >
> > Agreed, namespace cleanliness is one of my favorite forms of
> > anal retentiveness.
> >
> > The way I see it, the suggested collect-string is a variant of occur
> > where the result buffer contains none of the regexp matches's context.
> > So it would make sense to integrate it very tightly with `occur',
> > i.e. make M-x occur do the job of collect-strings for some particular
> > value of its argument NLINES. Currently, NLINES is assumed to be
> > a number and all values of that number have a useful meaning, so we'd
> > have to add this new feature via a non-number value of NLINES.
> >
> > E.g. C-u M-x occur could do the collect-string thingy (which is still an
> > incompatible change since some people may like to use C-u M-x occur to get
> > 4 lines of context, but you can make omelets without breaking eggs).
> >
> >
> > Stefan
> >
>
> Now I am convinced. How about the change below? In conventional
> occur zero or negative value for nlines is meaningless correct? We
> can use that for collection purpose. i.e. C-u 0 M-x occur does the
> collection of the matching pattern. C-u -1 M-x occur performs the
> collection of the recorded pattern 1.
>
> -Tak
>
> (defun occur-1 (regexp nlines bufs &optional buf-name)
> (unless (and regexp (not (equal regexp "")))
> (error "Occur doesn't work with the empty regexp"))
> (unless buf-name
> (setq buf-name "*Occur*"))
> (let (occur-buf
> (active-bufs (delq nil (mapcar #'(lambda (buf)
> (when (buffer-live-p buf) buf))
> bufs))))
> ;; Handle the case where one of the buffers we're searching is the
> ;; output buffer. Just rename it.
> (when (member buf-name (mapcar 'buffer-name active-bufs))
> (with-current-buffer (get-buffer buf-name)
> (rename-uniquely)))
>
> ;; Now find or create the output buffer.
> ;; If we just renamed that buffer, we will make a new one here.
> (setq occur-buf (get-buffer-create buf-name))
>
> (if (or (null (integerp nlines))
> (> nlines 0))
> ;; nlines is not zero or negative so perform nomal occur
> (with-current-buffer occur-buf
> (occur-mode)
> (let ((inhibit-read-only t)
> ;; Don't generate undo entries for creation of the initial
> contents.
> (buffer-undo-list t))
> (erase-buffer)
> (let ((count (occur-engine
> regexp active-bufs occur-buf
> (or nlines list-matching-lines-default-context-lines)
> (if (and case-fold-search search-upper-case)
> (isearch-no-upper-case-p regexp t)
> case-fold-search)
> list-matching-lines-buffer-name-face
> nil list-matching-lines-face
> (not (eq occur-excluded-properties t)))))
> (let* ((bufcount (length active-bufs))
> (diff (- (length bufs) bufcount)))
> (message "Searched %d buffer%s%s; %s match%s for `%s'"
> bufcount (if (= bufcount 1) "" "s")
> (if (zerop diff) "" (format " (%d killed)" diff))
> (if (zerop count) "no" (format "%d" count))
> (if (= count 1) "" "es")
> regexp))
> (setq occur-revert-arguments (list regexp nlines bufs))
> (if (= count 0)
> (kill-buffer occur-buf)
> (display-buffer occur-buf)
> (setq next-error-last-buffer occur-buf)
> (setq buffer-read-only t)
> (set-buffer-modified-p nil)
> (run-hooks 'occur-hook)))))
> ;; nlines is zero or negative integer perform collect-string
> (with-current-buffer occur-buf
> (setq nlines (- nlines))
> (fundamental-mode)
> (let ((inhibit-read-only t)
> (buffer-undo-list t))
> (erase-buffer)
> (while active-bufs
> (with-current-buffer (car active-bufs)
> (save-excursion
> (goto-char (point-min))
> (while (re-search-forward regexp nil t)
> (let ((str (match-string nlines)))
> (if str
> (with-current-buffer occur-buf
> (insert str)
> (or (zerop (current-column))
> (insert "\n"))))))))
> (setq active-bufs (cdr active-bufs))))
> (display-buffer occur-buf)))))
- Re: simple useful functions, (continued)
- Re: simple useful functions, Tak Ota, 2010/11/03
- Re: simple useful functions, Stephen J. Turnbull, 2010/11/03
- Re: simple useful functions, Tak Ota, 2010/11/03
- collect-string (was: simple useful functions), Stefan Monnier, 2010/11/04
- Re: collect-string (was: simple useful functions), Tak Ota, 2010/11/04
- Re: collect-string (was: simple useful functions),
Tak Ota <=
- Re: collect-string (was: simple useful functions), Tak Ota, 2010/11/04
- Re: collect-string (was: simple useful functions), Andreas Röhler, 2010/11/05
- Re: collect-string, Stefan Monnier, 2010/11/08
- Re: collect-string, Tak Ota, 2010/11/08
- Re: collect-string, Stephen J. Turnbull, 2010/11/09
- Re: collect-string, Tak Ota, 2010/11/09
Re: simple useful functions, Andreas Röhler, 2010/11/02